Reliability Analysis Research Of Goaf In Highway Based On Surface Settlement Observation

In recent years,China's highway engineering construction has achieved remarkable results,and its comprehensive transportation services and governance capabilities have improved significantly.At present,many roads in China are based on the goaf,which seriously affects the road capacity and the safety of urban residents.The most direct impact of the goaf on the location of the road is the initiation of subsidence.Therefore,the observation and study of the surface subsidence of the undercut goaf are carried out,and then the reliability of the goaf road is analyzed,and the relevant departments are instructed to guide the construction unit.Gob area management provides a scientific basis and has important theoretical significance and practical application value.The main work of the thesis is as follows:(1)Using literature research method,comparative research method and experimental observation method to study the reliability analysis of goaf roads,systematically combing domestic and international surface settlement observation,highway goaf reliability analysis and treatment Relevant research status,analyzed the existing problems.(2)Comprehensive analysis of existing literature and materials,and reference to the national standards and norms such as "Code for Geotechnical Investigation" and "Technical Specifications for Foundation Treatment of Coal Mine Goaf Construction",The concept analyzes the reliability index of the goaf and combines the engineering practice experience of the S312 line from the Lian Yuan to the Xin Hua section.It comprehensively summarizes the factors affecting the road reliability analysis of the goaf,including topography and geomorphic conditions,geological conditions,Meteorological and hydrological conditions,occurrence conditions of mining layers,mining time conditions,etc.;then each of the influencing factors were analyzed and studied in detail,which laid the relevant theoretical basis for the proposed reliability analysis method of goaf based on surface subsidence observation.(3)Through the field survey and historical data investigation and analysis of the location of the project area where the project project is located—the S312 line from the Lian Yuan to the Xin Hua section,the geological environment of the study area is analyzed,its geographical location,engineering overview,geological features,hydrology The meteorological characteristics and the overview of the goaf have been systematically analyzed and summarized,which laid a solid foundation for the subsequent engineering practice.(4)For the reliability analysis of highways in the goaf,summarize and analyze the relevant standards and specifications of the "Geological and Geotechnical Investigation Specifications for Coal Mined Areas" and the reliability analysis methods involved in the existing research results;Based on the observation method,the reliability analysis method based on surface settlement observation is proposed.The basic theory and implementation process of the method are elaborated.Finally,the S312 line Lian Yuan to Xin Hua section highway goaf treatment project is proposed.The reliability analysis method is used to carry out engineering practice.The practical results show that the method based on surface settlement observation can effectively analyze the reliability of the highway in the goaf,and the settlement data obtained by the level control network method has higher precision and The better current situation can clearly reflect the reliability status of the highway in the goaf.At the same time,the observation curve of the goaf settlement based on the aggregated observation data can clearly reflect the settlement trend of the goaf road.It can provide visual,intuitive and reliable statistical and analytical results and decision-making for highway roadway management.